Method of densifying fusible explosive nitro bodies.



G. ISSLER.

METHOD OF DENSIEYING FUSIBLB BXPLOSIVE NITRO BODIS. APPLI tTIoN FIL'BDJAN.13,'1912.

Mmmm Pttetttt sept. to, 1913.

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PWDER COMPANY, OF W'LMINGTON, DELAWARE, A CORPOB-r'llt F NEW" JERSEY.

METHD il? DENSIFYING FUSIBLE EXPLGSIVE NITROE Specification of LettersPatent.

Paten Application sind January 13, ll, Serial No. 671,096.

itrolodies, of Which the following is al if'ull, clear and exact descrition reference` being had to the acccmpanyingg1 drawings,

`which :term a partv of this specification.

The general method used for densiying explosive nitro bodies whichconsists in `,.3ressin; by mechanical means the powdered material inspecial presses is very inconv ient and expensive. For this reason anumber of other methods have been if densifying of nitro bodies lessexpensive and at simplifying lt is especially important to density nitrobodies which are to be used for charges of projectiles, mines andtorpedoes, because, with a higher density, the eiliciency is greater anda denser nitro body is less sensitive against outside inlucnces andinl'iuences during the shot.

Most of charges for projectiles are casiL in paste-board shells or pasteboard boxes which are sealed Water-tight, and the paste-board boxes mustbe entirely filled by the nitro body so as to prevent the formation oi'dust or allowing tl e 4charge to move in the box duringl the shot. Someorganic nitro bodies possess the property of contracting during tluxchilling, thus producing an interstice between the charge and thepaste-board box, which for reasons of safety must be eliminated.

l have discovered a method which produces, in a most simple manner, ashigh a density as possible of organic nitrobodies used for charges ofprojectiles, etc., and' which effects a tight bearing of these chargesagainst the Walls of' the paste-board boX.

I have discovered that if the upper part oi the lost head c. that partof the nitro body above the box when the process is iiiiished and whichis removed) be maintained liquid, While by means ofv a piston or othercompressive force, pressure is transmitted kthrough the liquid layer -tothe charge, the highest density oi' the nitro body will be produced, thesame will entirely ll the box and empty spaces in the cast Will beavoided.

oposed, all of which at rendering the.

l will nou'Y describe an apparatus for er" rying out my method, Wh Ashown in the accompanying ar" shows a front elevation, part' i( of suchapparatus.

A paste-board box'o is located. in a mold 5, the latter being somewhathigher than the paste-board box.

c is an iron pipe which rests on the top o' the box a and is closeiysurrounded at this lower portion by the mold o'. @n the upper e borderof the pipe crests a circular metal plate e' upon which a top piece l isWelded. An annular Washer hlt'or the purpose of dering the joint tightis inserted between tb. top ofthe pipe c d i e metal circular plate e.This top piece@V rms a jacleted hollow cylinder which4 can be heated l"i means of steam or by means opt another l generator, and the cylinderis for this p -A pose, provided with a steam ,inlet-z' and steam outlet'l'. The mold l; and the inten mediate piece c are by means of thebolts. fastened bet-Ween the bottom plate m and t" e metal circularplatee insucli manner that the Whole apparatus canbe rendered tight. Onthe plate c, on opposite sides of the top piece cl, are posts ln,connected, above the top-piece, by the cross-platen. ln the topi' pieceZV is a piston g. The piston rod gf e:-

tends up through the. cross-plate n", its f a pressure can be brought tobear upon the upper partof the nitro body which maintained liquid.

The operation of the apparatus is very simple. rl`he paste-board box ais placed in the mold b, the pipe c, plate c and top piece d are placedin position and rendered tight and then the liquid nitro body isintroduced. AConnection is then made with the steam lino. the heat isturned on, and the piston 5/ is screwed down, in which operation thelnitro body itself Serves as lubricant. The introduction of theliquid-is effected by removing the cover d of the top piece (Z and, bymeans of the hand wheel fr, raising` the piston g until it is Withdrawnfrom the interior.' of m *on niec. The pressure, of course. cfm

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be brought about in any other desired manner, for instance, by means ofa weight or by eon'qn'essed air. It has been found to be of advantage tocool the mold about to the upper border of the pastc-board box. Afterthe operation the upper part of the lost head that has been maintainedliquidy is ivithdrawn through the pipe 0. YT his method actually effectsthe high density (1.60 to 1.02) and an entire filling of the paste-boardbox with the nitro body. Empty spaces in the cast are impossible sincethe liquid nitro'body under pressure fills any'such spaees.

,I do not claim herein the apparatus herein described, as the same formsthe subjectmatter of a separate application filed by me of even dateherewith, Serial No. 671,097.

Having now fully described my invention, what I claim and desire toprotect by Letters Patent is: Y

l. The method for densifying fusible eX- plosive nitro bodies, Vwhichconsists in casty ing the main body with an integral part .projectingbeyond the same tol form the lost` head and maintaining in a liquidstate the part of the lost head more remote from the main body Whileapplying pressure through the liquid layer to the charge.

2. The method for densilying fusible explosive nitro bodies cast incontainers Which consists in cliargingthe container and allowing),- anintegral part of the nitro body to project above the container to formthe lost head and maintaining the upper part of the lost head liquidWhile applying pressure through the liquid layer Ytothe charge.

3. The methodfor densifying fusible e5;- plosive nitro bodies whichconsists .in applying heat to'and thereby maintaining fused or liquidone end of the charge, and applying pressure tothe charge through themedium of the part maintained liquid While Y.

gradually chillingl the part of the charge morel remote from the partmaintained liquid.

ln testimony of which invention, l have hereunto set my hand, atCologne7 Germany, on this 15th day of December, 1911.

GUTTHOLD ISSLER.

litnesses: i

ANIs VANDORY, Bassin F. DUNLAP.

